Adjustable lathe tailstock and combination tool



H. A. BARKUS ADJUSTABLE LATHE TAIL-STOCK AND COMBINATION TOOL File'd Oct. 51. 1949 INVENTOR. HOMER A. BAR/(U3 m 3. cm

Patented Aug. 19, 1952 UNITED STATES PATENT OFFICE Z 1- ADJUSTABLELATHEQTAiLSTOCK'AND y j j COMBINATION 'roonthe objects of my inVen-.

tool which will'take the' place or the conventional-tailstock on various watchmaker's lathes'; 7 Second, to provide an adjustable lathe'tailstock and combination toolof" this class-which is provided-with means} for" adjusting the axis" of the tailstock' vertieally to: provide foralignment thereof with-theheadstock axis; 1 v

- ---"Ihir'd,- to'provide an adjustable lathe tail's'tock and combinatiori' tool; or this class which may be easily aligned by inserting a true; bar in the chuck of the headstock and tailstock' concurrently, and setting thetaflstockin accordance therewith, whereby'very accurate" alignment of the axes of "the lathe headstock and' said tail- -'-Fou.rth,-"to provide an" adjustable lathe tailstock' and combination toolwhich readily receiv 's chucks anemones, which may alternatel be used in the headstock of a conventional watchmakerslathe; "'Fifth, to providean'adjustable lathe tailstook and combination 13061 of thiS'cIa'SS which is providedwith index m ans which" may be; used in machining rectangular in' cross-section portions on various bars, and stems, or the like; I Sixth,'to provide a tool of this'class which may be used for broochsharpening; w I a Seventh, to provide" a tool ofthis; class which m y be used for screw-headpolishing; H 7

Eighth, to provide an adjustable lathe tailstock and combinationtool of this class" which greatly facilitates the operation of sawblades, grindingwheels, laps and various: polishing de-= vices carried try the lathe headstock chuck ad jacnt-to said combinatioritool; F n I Ninth, to provide adjustable lathe tails'tock and ccnibination-tool of this class which may be used for variousmillin'garid surface grinding op: erations; U J h i v Tenth, to provide an adjustablelathetailstock and conibination moi of this class which may be usedfor very accurately repointing' the balance shafts of ala-ihi loksdl the like? Ele 'ent'h, toprovi' e' a too; cums c ass which may be-used to true up" eccentric clock or watch escape wheels and train wheels or the like, so that theyriin concentric of their own axes; v

Twelfth, to provide a tool of this class which maybe usedl as air indexing head for various drilling operations;

,tI JHomer. A. Ba,lk11S, san Diego, cam: H 7 1 estimation October 31, 194 9, S erial N nests" (01. 29 27) polishingattachment' for a watchmakers lathe;

and

' Fourteenth, toprovi'de an ustable lathe tailsto'ek" and combination tool of this class which is very" simple and economical of construction, e'fli'cient in operation; and which willfnot' readily deteriorate or getoutof'order! l 3' With. these and other obj ects iniview," as will appear" hereinafter, my invention consists of certain novel features of construction, combination and arrangement of parts and portions, as will behereinafterdescribed" in detail and particularly set forth in the appended claims; reference being had to the accompanying drawings and to the characters of reference thereon, forming a part of this application, in which Fig; 1 is aside elevational view or my adjustable' lathe tailsltock and combination tool, showing portions thereof broken away and in Section to amplifythe illustration; Fig zisfanend elev vational view" thereof, showing portions thereof brokenflawaylto' facilitatethe illustration; Fig. 3 is a sectional I view, taken from" the line 3-3 of Fig. 1; Fig. 4 is a'fragrnentary sectiohalpvie'w, taken-fromthe" 'l'ine*4'4 oLFi'g; 1; Fig,'.'5 is a fragmentary sectional view, taken; from "the line 5-5 ofyFig; 1; and Fig. 6 is' a fragmentary'plan sectional view, taken from the line 6 -6 ofFi'g. 1. Similar characters of referenc'e refer to simi- 131" parts and portionsthreughout the several views'oft'lie drawings; v

The'base plate I','h'ol'ddown boltz, incline member 3,. frame-4', shaft v5; drawbar t index memhers I; and 8", set screwse and I0, bolts II and I2, blockingarms l t," ltand' I5, collet fixture it. work" support lfl", adjusting sleeve I8, and the holddown member i 91 constitute the principal parts and portions of my. adjustable latheptail stock and'combination tool.

The base plate I is an elongatedrectangular plate, having substantially flat upper and lower sides l'aand lb, and this plate, as shown in Fig. 2 of the drawings, is substantially rectangular-T in cross-section; Thisbase plate I; communicating" with theupp'er'side' thereof and'one'ehd thereof, i provided with an open T-slotteti portion 1c. communicating- Witl'i'thef lower side la Of this base plate I ,Land' the opposite end theredflisth open T;sl-ot Id, as shown in' F'ig; '1' of thedrawings; Positioned inthejT'esl'ot id is the holddown bolt 2-, which is-a substantially eonventi'onal'h'olddown bolt, asdisclose'dfin my 'CO'fpEQnQiIlg "app1ication, Serial No. 33,811, filed June 18, 1948, for Tool Post Holddown, now abandoned.

The holddown member lfl is provided. with a T-head I9a engaged in the T-slot Io, as shown in Fig. 2 of the drawings, and this holddown member 19, as shown in Fig. of the drawings, is provided with an upwardly extending shank 19b, having a bore I90 through which an eccentric portion [4a of the horizontal shaft I41) of the locking arm l4 extends. At opposite sides of this eccentric portion 1411 the shaft Mb is revolubly mounted on a horizontal axis transversely within the bore portion 3a of the incline member 3. The incline member 3 is provided with a flat lower surface 3b, resting on the upper surface I b of the base plate I, and this incline member 3 is pro-' vided with an inclined upper surface 3c," having dove-tailed ways 3d thereon. These dove-tailed ways 3d are engaged by conforming wayslportions 4a in the lower end of the frame 4, which is inclined in conforming relationship with the upper inclined surface 30 of the incline member 3.

The frame 4 is provided with a centrally slotted portion 41), which is centrally of the dove-tailed ways portion 3d of the incline member 3. and the bolts II and I2 extend through the frame 4, abridging the slotted portion 422 for forcefully compressing the ways portions 4a in secure .enaged relation with the dove-tailed ways 3d of the incline member 3; Communicating with the upper end of the slottedv portion 4b is the circular in cross-section bore 40,- which extends horizontally through the frame 4, all as shown best in Figs. 1 and 4 of. the drawings. Reciprocally and revolubly mounted in this bore 40 is the shaft 5, which is a hollow shaft having an internally tapered collet receiving end portion 5a, and a bore 5b concentrically therewith and extending therethrough to the opposite end thereof The draw bar 6 is a, hollow cylindrical member, having an internally screw threaded portion 6a, adapted to engage the external screw threadllfia of the collet fixture IE, or any other conventional collet shank which is externally screw threaded. Fixed to the normally rear end of the 'draw bar 6 is a knurled hand wheel 61:, which provides for manual tightening ofthe draw bar 6 when'firmly engaging a collet in the tapered bore portion 5a hereinbefo're described. Fixed to the outer side of the shaft 6 by means of the set screw I0 is the indexing member 1, which is provided with a plurality of equally spaced notches 7c in its periphery. These notches 1a are engageable with the pin index member 8 in a veryprecise manner. The tolerance fit of these indexing members i and 8 provides for certain precise setting of the shaft 5 within the frame 4. One end of .the indexing member 8 is provided with a tapered portion 8a, which facilitates the engagement of the indexing member I therewith when moved longitudinally of the axis thereof during reciprocal movement of the shaft 5 within the bore portion 40 of the frame 4.

The set screw 9 fixes the indexing member 8 within the frame 4, all as shown best in Fig. 4 of the drawings. As shown in Figs. 1 and 4 of the drawings, the locking arm 13 is provided with an integral externally screw threaded shaft [3a, which extends through the frame 4, abridging the slotted portion 4b therein. Externally screw threaded on this portion [3a is a nut-l3b, having an arcuate recess I30, which conforms to the outer arcuate surface of the shaft 5, and opposed to this nut I3!) is a secondary nut i311, having an arcuate recess [3e conforming to the outer arcuate surface of the shaft 5. It will be noted that the nut 13d is abutted to the head portion of the locking arm l3, so that rotation of the externally screw threaded portion l3a forces the nuts [3b and [3d together, engaging the arcuate surfaces I30 and I3e with the outer side of the shaft 5 for locking the same in the bore portion 40 in the frame 4.

The collet fixture l6, integral with its externally screw-threaded shank portion [6a, is provided with an externally tapered collet head portion I61), which conforms with the internally tapered bore portion 5a in one end of the shaft 5. Integral with the tapered head portion l6b is a rec- "tangular split head portion I60, through which the externally screw threaded stud portion 15a of the locking arm I5 extends for clamping opposite sides .of the portion I60 securely on the shaft portion Ila of the work support 11. This work support I! is provided with a fiat plate l'lb having a work supporting surface l'lc on the upper side thereof, to which various elements may be adhered or clamped, as desired. 7

The oppositeendof the shaft portion Ha is provided with an external screw thread lfld, engaged by the internally screw threaded bore portion 18a of the adjusting sleeve l8, the lower end of which bears against, the collet fixture 16, providing vertical adjustment of the work support 17, as desired. 7

The operation of my adjustable lathe tailstock and combination tool is substantially as follows: The base plate I, may be fixed, bymeans of the holddown bolt 2,. in various vpositions longitudinally of the lathe bed ways, a indicated by dash lines A-inEig. 1 of the drawings, The incline member .3 may berotata'blymoved, and fixed on the uppersurface ofthe base plate 3?) by means of the holddown membecmfwhich serves as a pivot and a fixture for 'clamping the incline member 3 in certain position, either :parallel to or angularly disposed to the axis of the lathe headstock. Vertical alignment of i the axis of the shaft 5- with theaxis of the lathe headstock may be accomplisl ied bynioving the frame 4, at its ways portions 4a. on the dove-tailed ways 3d of the incline member '3. When certain vertical alignment of the shaft 5 is accomplished relative to. the axis of the lathe headstock, the'bolts I I and l2'maybe tightened, clamping the ways portions 40; 'on the dove-tailed ways 3d of the incline member3f- The shaft 5', at its taperedbore portion 5a, may optionally receive the collet flxture I 6, or any other conventional chuck on collet common to a watchmakers lathe, and-this; shaft 5 -may be reciprocated or rotated as desired or may be indexed many-certain position desired by means of the indexing. members I and 8, it being noted that the notches la in the indexing member 1 may be varied in their peripheral spacing, as desired, and it is obvious-that the tool :may be equipped with several of these indexing members I to provide for different indexing head operations, as desired; The shaft 5 may be fixed in position by means of the locking arm l3,;as hereinbefore described, and the indexing member 8 may be removed by loosening the set-screw 9, if. desired, permitting complete T rotation of-the shaft 5, together withtlieL particular collet supported therein by means of the draw bar 6, which is a substantially.conventional draw'barstructure.-- .L F

It is to be noted that a-collet or chuck may be placed in the tapered bore portion 5a of the shaft 5, and that a true bar may be placedin the chuck aeomos at; the headstock of the lathe, and the ma thnbe en aged byfth'e collet or chuck n the Shaft 5- and adjlil'sifhieiltsmay be made vitically by means Of the frame! in llgagl fint wlth the inclined dovertailed iways' 362, While angular alignment may be made'i'by rotation of the incline member 3 about ,t'he'axis of th'e'hol'ddo'wn member 191' After 'such' alignment adjustments have been made, the adjustments may be 'fixe'd" by means of the bolts l l and; i2, and thelockin'g arm 14, all of'which aligns and fixes precise alignment of the shaft 5 and the lathe he'adstoek at their axes.

When it is desired to repaint the balance of an alarm clock, it may be fixed in a collet or chuck positioned in the'borebapfthe shaft 5, and the taper angle of the balance, may be provided for by pivoting the incline members about the axis of the holddown membef |'9, 's'o that the end of the balance'may be advanced into contact with a grinding wheel supported in the headstock of the lathe, and the shaft 5 may be rotatedduring the finish grinding of the balance points,

which renews an old worn balance with a mini mum amount of effort, and renders accurate and precise.

For the purpose of index drilling, the-axis of the shaft 5 may be vertically offset relatively to the axis of thelathe' headstock by means of the inclined ways 3d of the incline member 3. The index members I and 8' may be employed toindex the shaft 5 for locating the work held in the chuck secured to the shaft 5, a drill may be placed in the headstock chuck of the lathe, and the shaft 5 may be successively reciprocated in the bore 4:: of the frame 4 and progressively rotated from one index notch la, to the next one, each time engaging the respective notch la. with the index member 8, whereupon each reciprocal movement of the shaft 5 may accomplish the drilling of a hole in the work at a precise indexed location.

When it is desired to perform milling or grinding operations, the work may be placed on the plate surface Hc of the work support I1, and may be vertically adjusted by means of the adjusting sleeve l3, engaging the collet fixture l8, which accomplishes longitudinal movement of the shaft 1m through the collet fixture urged by the helical screw threads [1d and 18a. The shaft Ila may be fixed in certain adjusted position by means of the locking arm I5, and its respective screw threaded portion a, as hereinbefore described, and illustrated in Fig. 6 of the drawings. Work pieces may be fixed to the plate portion He in various ways, as desired, either by clamping the same thereto or adhering parts to the surface l'ic, if desired.

It will be noted that various angular relationships of the work as presented to various tools in the headstock of the lathe may be accomplished by pivoting the work support I! about the axis of the collet fixture [6 in the tapered bore 5a of the shaft 5, and other angular disposition may be accomplished on a vertical axis by means of the holddown member l9, which promotes the pivotal relationship of the incline member 3 upon the base plate I, as hereinbefore described. s

It is obvious that numerous drilling, machining and grinding operations may be performed by means of my adjustable lathe tailstock and combination tool which have not been hereinbefore described.

Though I have shown and described a parthe sam-e very Having thus" de crib mymvendon, what. I claini asnew' and desireto secure by letters 10 Patentisff ,ways' of saidv incline. member, and V a collet receiv- ,ing shaft reciprocally.and olubly mounted 'in tr ms-.9 h ie h e axis; a ap -Tie be aligned w t t i fstened? xis? the a e c -i mount d a} I d w F e fiel ee. sa haft he i are .ra i re. riie i e o p it s d hereo fr a dl w bar adapted to a receivecollets ortheliker, an index m b o e Qsterside 0 id..- t: a n

notch portionsv in, the v periphery thereof, and a secondary indexmember-on said: frame engage able with said notch portions when said shaft is reciprocated in said frame.

2. In an adjustable lathe tailstock and combination tool, a base plate. holddown means for securing said base plate on the lathe bed ways of a conventional watchmaker's lathe, and in longitudinal adjustable relationship therewith an incline member pivotally secured to said base plate, and adjustably mounted on a vertical axis relative thereto, said incline member having an upper inclined ways portion. a frame having conforming ways portions engaging said inclined ways of said incline member, and a collet receiving shaft reciprocally and revolubly mounted in said frame on a horizontal axis, adapted to be aligned with the headstock axis of the lathe on which it is mounted, a draw bar in said shaft,

said shaft having a tapered open bore portion notch portions in the periphery thereof, and

a secondary index member on said frame engageable with said notch portions when said shaft is reciprocated in said frame, a locking arm, having a screw threaded portion extending through said frame adapted to clamp said shaft in fixed position relative thereto.

3. In an adjustable lathe tailstock and combination tool, a base plate, holddown means for securing said base plate on the lathe bed ways of a conventional watchmaker's lathe, and in longitudinal adjustable relationship therewith an incline member pivotally secured to said base plate, and adjustably mounted on a vertical axis relative thereto, said incline member having an upper inclined ways portion, a frame having conforming ways portions engaging said inclined ways of said incline member, and a collet receiving shaft reciprocally and revolubly mounted in said frame on a horizontal axis, adapted to be aligned with the headstock axis of the lathe on which it is mounted, a draw bar in said shaft, said shaft having a tapered open bore portion T Inan adjustable lathe itailstdok and combinat'iori tool,}a base'- -plate,i holddown" means for securing, ,saidf base" plateon the lathe, bed ways of conventional. pacemakers. lathe; and fin in the opposite end thereof from said draw bar adapted to receive: 'collets' or the like, an index member on theouter side of said shaft, having notch portions in the periphery thereof, and a secondary indexmember on said frame engageable with said notch portions when said shaft is reciprocated in said frame, a locking arm, having a screw threaded portion extending through said frame adapted to clamp said shaft in fixed position relative thereto, a collet fixture engaged in said tapered bore portion of said shaft having a work support reciprocally mounted therein at right angles to the axis of said shaft, provided with a flat work supporting plate thereon 4. In an adjustable lathe tailstock and combination tooL-abase plate, holddown means for securing said base plate onthe lathe bed ways of a conventional watchmakers lathe, and in longitudinal adjustable relationship therewith an incline member pivotally, secured to said base plate, and adjustably mounted on a vertical axis relative thereto, said incline member having an upper inclined ways portion, a frame having conforming ways portions engaging said inclined ways of said incline member. and a collet receiving shaft reciprocally and 'revolubly mounted in said frame on a horizontal axis, adapted to be aligned with jthe'headstock axis of the lathe on whichit is mounted, a drawbar in said shaft, said shaft having a tapered open bore portion in the opposite end thereof from said draw bar adapted to receive collets or the like, an index 8 member on the outer side of said shaft, having notchportions in the periphery thereof,and a secondary index member on said frame engageable :with 'said' notch portions when said shaft is reciprocated in said frame, a locking arm, having ascrew threaded portion extending through said frame adapted .toclamp said shaft in fixed position relative thereto, a collet fixture engaged in said tapered boreportion of said shafthaving a work support reciprocally mounted therein at right angles to the axis of said shaft, provided with a fiat-work supporting plate thereon, means for adjusting said plate laterally of the axis of said shaft. 4

HOMER A. BARKUS.

REFERENCES CITED The following references are of record in the file of this patent: r 1

UNITED STATES PATENTS Number 'Name Date 2307,0475" Strickland Oct. 17, 1893 647,644 'Blount Apr. 17, 1900 1,005,504 Blugok Oct. 10, 1911 1,028,728 Hughes June 4, 1912 1,358,164 Kottinger Nov. 9, 1920 2,035,999 Tiefenbacher Mar. 31, 1936 FOREIGN PATENTS Number Country Date 17,298 Great Britain of 1901 

